<!DOCTYPE html>
<html>
    <head>
        <link href="index.css" rel="stylesheet"/>
    </head>
    <body>
        <div class="container">
            <div class="ball"></div>
            <div class="ball"></div>
            <div class="ball"></div>
            <div class="ball"></div>
            <div class="ball"></div>
            <div class="ball"></div>
            <div class="ball"></div>
          </div>
    </body>
</html>